Posted by Janicholson on September 22, 2023 at 06:54:24 from (24.240.46.228):
In Reply to: Snake OIl? posted by Geo-TH,In on September 22, 2023 at 05:16:35:
Alcohol based additives in engine oil will absorb a limited amount of moisture when the engine is cold. However the engine, when running is not cold! the engine oil is going to be in the neighborhood of 200 to 260 degrees F. This is substantially more than the boiling point of the alcohol. Alcohol evaporates easily at normal ambient temperatures. Thus the alcohol will evaporate in the crankcase, be drawn out into the PCV (even in a lawn mower) and burned as it disappears. Water in the oil will also evaporate and disappear as engines reach operating temps. Sticking valves are caused by three things or a combination of them: Deposits on the stem from combustion or coking of oil, Too tight stem clearance, Bent or warped valve stem. Good quality engine oil, changed regularly, is all that is needed. in most cases. Neglected engines have the most issues (duh). Valve stem seals on modern engines are used to regulate oil passage into the guide/stem interface. they also reduce pollution and reduce coking. Oil today is massively better than that of even 20 years ago. Keep engines from operating short run times as much as possible, and the water issue goes away. Jim
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